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