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