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