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