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