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