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