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