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