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