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