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)(20,27)(21,29)(22,23)(24,31)(26,28)(30,32)(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)(17,19,22,27)(18,20,23,25)(21,30,31,26)(24,32,29,28)(34,39)(36,41)(37,45)(42,48)(2,6)(7,10)(8,12)(14,16)(18,23)(20,25)(24,29)(28,32)(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)(17,20,22,25)(18,19,23,27)(21,28,31,32)(24,26,29,30)(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)(18,20)(21,26)(22,27)(23,25)(24,28)(29,32)(30,31)(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)(18,24)(19,26)(20,28)(22,31)(23,29)(25,32)(27,30)(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.