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