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