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