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