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