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)(19,29)(20,26)(21,28)(22,27)(23,25)(24,30)(31,42)(32,38)(33,39)(34,41)(35,44)(36,40)(37,43)(45,48)(46,47)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,30)(18,24,27,29)(20,33,35,31)(21,36,23,32)(25,40,28,38)(26,42,44,39)(34,45,37,46)(41,47,43,48)(9,11,12,16)(10,13,14,15)(18,25)(19,30)(21,23)(24,38)(26,41)(27,28)(29,40)(31,33)(34,37)(39,47)(42,48)(43,44)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,20)(18,26)(19,31)(21,37)(22,35)(23,34)(24,39)(25,41)(27,44)(28,43)(29,42)(30,33)(32,46)(36,45)(38,47)(40,48)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,21,22,23)(18,25,27,28)(19,32,30,36)(20,34,35,37)(24,38,29,40)(26,43,44,41)(31,45,33,46)(39,48,42,47)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.