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