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