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