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