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