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