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