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