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