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