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