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