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