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