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