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