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