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