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