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