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