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