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)(35,43,45,39)(36,40,48,57)(37,50)(38,41)(42,53)(44,54)(46,55,51,59)(47,64)(49,60,52,58)(56,63)(61,62)(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)(33,35,38,45)(34,39,41,43)(36,47,48,63)(37,51,53,46)(40,56,57,64)(42,59,50,55)(44,52,62,49)(54,60,61,58)(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)(34,40,41,57)(35,44)(37,52)(38,48)(39,54,43,61)(42,60,50,58)(45,62)(46,63)(47,51)(49,53)(55,64,59,56)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.