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