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