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