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