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