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