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