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