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