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