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