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