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