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