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