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