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