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