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)(11,13)(12,14)(15,16)(17,18,21,25,22,26,33,39)(19,23,29,36,27,34,41,45)(20,30,32,44,31,24,37,38)(28,42,43,48,40,35,46,47)(2,5)(3,7)(9,11,12,15)(10,13,14,16)(19,27)(23,34)(28,40)(29,41)(35,42)(36,45)(43,46)(47,48)(1,3,4,7)(2,6,5,8)(10,14)(13,16)(17,19)(18,23)(20,28)(21,29)(22,27)(24,35)(25,36)(26,34)(30,42)(31,40)(32,43)(33,41)(37,46)(38,47)(39,45)(44,48)(2,5)(6,8)(19,27)(20,31)(23,34)(24,30)(29,41)(32,37)(36,45)(38,44) involution — undirected(17,20,21,32,22,31,33,37)(18,24,25,38,26,30,39,44)(19,28,29,43,27,40,41,46)(23,35,36,47,34,42,45,48)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.