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