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