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