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