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