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