I would have bet any money that the Hans Georg GRAFF who accompanied Georg Friedrich KAPP on the 1732 crossing was Georg Friedrich's future father-in-law, but other sources show that that Hans Georg GRAFF had immigrated in 1695 and founded Groffdale in Lancaster County in 1717.  So… who is the Hans Georg GRAFF who made the crossing in 1732?  And how is he related to the other GRAFFs in Tulpehocken? 

1.  William Henry Egle, ed.  1890.  Names of Foreigners Who Took the Oath of Allegiance to the Province and State of Pennsylvania, 1727-1775, with the Foreign Arrivals, 1786-1808.  Pennsylvania Archives, Vol. XVII, Second Series, Harrisburg, PA (reprinted 1967ff by Genealogical Publ Co., Baltimore, MD; in 2000 as Broderbund CD-512):

p. 45	LIST OF PASSENGERS IMPORTED IN THE SHIP PENNSYLVANIA, JOHN STEDMAN, MASTER, FROM ROTTERDAM, LAST FROM PLYMOUTH. QUALIFIED SEPT. 11, 1732... Michael Capp... Georg Friedrich Capp... Hans Georg Graff... — [The original list is herewith given.]...
p. 46	Hans Graff... Michael Capp... Frederick Capp...

2.  Ralph Beaver Strassburger (William John Hinke, ed.).  1934. Pennsylvania German Pioneers: a Publication of the Original Lists of Arrivals in the Port of Philadelphia from 1727 to 1808.  2 vols.  Norristown, PA (reprinted 1966ff by Genealogical Publ. Co., Baltimore, MD; Broderbund CD-267):

p. 66	[List 20A] A List of Palatine Passengers on Board the Ship Pensilvania Merchant, John Stedman, Commander, from Rotterdam. [Qualified Sept. 11, 1732.] MENS NAMES... Hans Graff...
p. 67	Michael Caap Fridrich Caap WOMEN AND CHILDREN...
p. 68	A true List. John Stedman.  73 Men  98 Women & Children ___ 171 [Total]   3 dead ----- 168 [Persons] Philadia Septemr 11th 1732. Present: The Honble Pat. Gordon, Esqr, Lt Govr, S. Hassell, Esqr, Mayr, A. Hamilton, Esqr, Recorder. The foregoing List was upon Oath declared by John Stedman to be a true & exact one. Robt Charles, Cl. Con. "At the Courthouse of Philadelphia, Septr 11th, 1732.... A List was presented of the Names of Seventy Palatines, who with their families, making in all One hundred & sixty eight Persons, were imported here in the Ship Pensylva. Merchant, John Stedman, Master, from Rotterdam, but last from Plymouth, as by Clearance thence." From the Minutes of the Provincial Council, printed in the Colonial Records, Vol. III, p. 452. [List 20 B] Palatines imported in the Ship Pensylvnia Mercht, of London, Jno Stedman, Mr, from Rottr, but last from Plymouth, p Clearance thence. Qualified Septemr 11th 1732...
p. 69	Hans Georg Graff... Michael Capp Georg Fridrich Capp... [List 20 C] Palatines imported in the Ship Pensylva Mercht, Jno Stedman, Mr.
p. 70	Hans Georg Graff... Michael Capp Georg Friedrich Capp... Philadia Sepr 11th 1732. At the Courtho in presence of the Govr, the Mayor and Recorder of the City, the foregoing Qualifications were taken &
p. 71	subscribed by the several foreigners whose Names are contained on this Leaf. Robt Charles, Cl. Con.

3.  Israel Daniel Rupp.  1876.  Thirty Thousand Names of German, Swiss, Dutch, French, and Other Immigrants in Pennsylvania from 1727 to 1776.  (republ. 1931, Leipzig; republ. 1965, Genealogical Publ. Co., Baltimore, MD; Broderbund CD-267):

p. 073	20) Sept. 11, 1732. Palatines imported in the ship Pennsylvania, Jno. Stedman, Master, from Rotterdam, last from Plymouth.--Col Rec. III. 452. Seventy-three males above sixteen; women and children, of both sexes and different ages, ninety-eight--in all, one hundred and seventy-one.--(Editor.)
p. 074	Hans Georg Graff, ?... Michael Capp, Georg Friedrich Capp...
p. 466	The first settlers in Tulpehocken were Lutherans and German Reformed.  Rev. Tobias Wagner was the first pastor of the Lutheran Congregation.  The following is a List of the members of the Tulpehocken Church, from 1743 to 1746... Georg Graf sen., Friederick Kapp, Andreas Kapp... Andreas Graf...
p. 467	Joh. Martin Cass, Geo. Vitus Cass, Joh. Michel Kapp... Johannes Graf... Georg Graf jr...

"Cass" is an obvious misreading of "Cap."