One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12)(4,10)(5,11)(6,20)(7,9)(8,15)(13,27)(14,21)(16,26)(17,24)(18,23)(19,25)(22,28)(29,32)(30,31)(33,34,38,42)(35,39,44,52)(36,46,47,61)(37,49,50,41)(40,54,55,48)(43,56,57,64)(45,60,59,53)(51,62,63,58)(1,3,5,14,7,16,6,15)(2,8,20,26,9,21,11,12)(4,13,19,30,18,29,17,28)(10,22,24,32,23,31,25,27)(33,35)(34,39)(36,43)(37,45)(38,44)(40,51)(41,53)(42,52)(46,56)(47,57)(48,58)(49,60)(50,59)(54,62)(55,63)(61,64)(2,9)(8,21)(10,23)(11,20)(12,26)(22,31)(24,25)(27,32)(33,36,37,48,38,47,50,54)(34,40,41,46,42,55,49,61)(35,43,45,58,44,57,59,62)(39,51,53,56,52,63,60,64)(1,4,7,18)(2,10,9,23)(3,13,16,29)(5,19,6,17)(8,22,21,31)(11,25,20,24)(12,27,26,32)(14,30,15,28)(36,47)(40,55)(43,57)(46,61)(48,54)(51,63)(56,64)(58,62)(1,5,7,6)(2,11,9,20)(3,14,16,15)(4,17,18,19)(8,12,21,26)(10,24,23,25)(13,28,29,30)(22,32,31,27)(35,44)(39,52)(43,57)(45,59)(51,63)(53,60)(56,64)(58,62)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.