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