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