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