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)(17,18,22,24)(19,28,29,43)(20,33,35,26)(21,27,23,37)(25,31,38,32)(30,45,44,42)(34,41,36,40)(39,46,48,47)(1,3,6,2)(4,8,5,7)(9,11,12,16)(10,13,14,15)(18,24)(19,29)(26,33)(27,37)(30,44)(31,32)(40,41)(46,47)(11,16)(13,15)(17,19,23,32,22,29,21,31)(18,25,27,28,24,38,37,43)(20,30,34,46,35,44,36,47)(26,39,41,42,33,48,40,45)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,20)(18,26)(19,30)(21,36)(22,35)(23,34)(24,33)(25,39)(27,41)(28,42)(29,44)(31,47)(32,46)(37,40)(38,48)(43,45)(1,5,6,4)(2,7,3,8)(17,21,22,23)(18,27,24,37)(19,31,29,32)(20,34,35,36)(25,28,38,43)(26,40,33,41)(30,46,44,47)(39,45,48,42)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.