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