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