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