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