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