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