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