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