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