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