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