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