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