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