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