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