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