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