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