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