One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,12,8,13,6,31)(3,14,19,34,18,41,17,9)(4,20,25,50,24,10,23,36)(5,26,30,11,29,38,28,39)(15,40,44,48,21,51,43,32)(16,45,47,62,46,33,27,37)(22,53,56,35,57,61,55,49)(42,59,54,60,52,63,58,64)(1,3)(2,9,13,34)(4,21,24,15)(5,27,29,47)(6,17)(7,19)(8,18)(10,32)(11,37)(12,14,31,41)(16,28,46,30)(20,48)(22,54)(23,44,25,43)(26,33)(35,60,49,64)(36,40)(38,45)(39,62)(42,55)(50,51)(52,56)(53,59,61,63)(57,58)(1,4)(2,10,13,20)(3,15)(5,22)(6,23)(7,25)(8,24)(9,32,34,48)(11,35,39,49)(12,36,31,50)(14,40,41,51)(16,42)(17,43)(18,21)(19,44)(26,53,38,61)(27,58)(28,55)(29,57)(30,56)(33,59,45,63)(37,60,62,64)(46,52)(47,54)(1,5,6,28,8,29,7,30)(2,11,31,26,13,39,12,38)(3,16,19,47,18,46,17,27)(4,22,23,55,24,57,25,56)(9,33,14,37,34,45,41,62)(10,35,50,53,20,49,36,61)(15,42,44,54,21,52,43,58)(32,59,40,60,48,63,51,64)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.