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)(20,21)(24,31)(25,28)(26,29)(30,32) involution — undirected(1,3)(2,6)(4,11)(5,9)(7,15)(8,13)(10,12)(14,16)(17,18)(19,24)(20,23)(21,28)(22,25)(26,30)(27,32)(29,31) involution — undirected(3,9)(6,13)(10,11)(14,15)(17,19,22,27)(18,24,25,32)(20,26,21,29)(23,30,28,31)(1,4,5,12)(2,7,8,16)(3,10,9,11)(6,14,13,15)(17,20,22,21)(18,23,25,28)(19,26,27,29)(24,30,32,31)(2,8)(6,13)(7,16)(14,15) 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.