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