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