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