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