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