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