One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12,15,8)(4,16)(5,20)(6,11)(7,10)(9,18)(13,30,32,26)(14,24,21,25)(17,23,31,29)(19,28)(22,27)(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)(2,8)(4,17)(5,14)(6,21)(7,15)(9,26)(10,12)(11,24)(13,18)(16,29)(19,31)(20,25)(22,32)(23,28)(27,30)(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)(2,9,10,27)(3,13)(5,18)(6,22)(7,19)(8,23,12,29)(11,16,20,28)(14,31)(15,32)(17,21)(24,26,25,30)(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.