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