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