One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12)(4,13)(5,9)(6,10)(7,11)(8,15)(14,16)(18,22)(19,25)(20,28)(23,31)(24,32)(26,29)(27,30) involution — undirected(1,3,7,8)(2,4,11,16)(5,14,6,13)(9,12,10,15)(17,18,21,23)(19,26,27,32)(20,29,28,24)(22,30,31,25)(1,4)(2,8)(3,11)(5,15)(6,12)(7,16)(9,14)(10,13)(19,27)(22,31)(25,30)(26,32) involution — undirected(1,5,7,6)(2,9,11,10)(3,13,8,14)(4,15,16,12)(17,19,28,30,21,27,20,25)(18,22,29,32,23,31,24,26)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.