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