One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,12,7,10,5,11)(3,13,15,28,16,8,22,24)(4,17,20,27,19,9,21,26)(14,23,31,32,30,29,18,25)(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)(2,8)(4,18,19,31)(5,15)(6,22)(7,16)(9,25,17,32)(10,13)(11,24)(12,28)(14,20,30,21)(23,26,29,27)(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)(2,9,10,17)(3,14)(5,21)(6,20)(7,19)(8,23,13,29)(11,27,12,26)(15,31)(16,30)(18,22)(24,32,28,25)(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.