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