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