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