One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,10)(11,14)(12,15)(13,16) involution — undirected(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,16)(14,15) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,16)(14,15) involution — undirected(9,11)(10,13)(12,16)(14,15) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,11)(10,14)(12,16)(13,15) involution — undirected(1,2)(3,5)(4,7)(6,8)(9,10)(11,13)(12,15)(14,16) 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.