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