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