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