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