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