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