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