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