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