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