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