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