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)(19,28)(20,33)(21,27)(22,26)(23,37)(24,30)(25,36)(29,44)(31,43)(32,39)(34,40)(35,41)(38,46)(42,47)(45,48)(1,3)(2,5)(4,8)(6,7)(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)(27,39,37,43)(33,48,41,44)(34,46,36,47)(10,13)(14,16)(17,20,22,35)(18,25,26,40)(19,29,30,45)(21,36,23,34)(24,38,28,42)(27,41,37,33)(31,47,32,46)(39,44,43,48)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(18,26)(19,30)(25,40)(27,37)(29,45)(31,32)(33,41)(46,47)(3,8)(5,7)(10,13)(14,16)(17,21,22,23)(18,27,26,37)(19,31,30,32)(20,34,35,36)(24,39,28,43)(25,33,40,41)(29,46,45,47)(38,48,42,44)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.