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