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