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