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