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