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