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