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