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