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