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