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