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