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)(11,16)(12,15)(17,18)(19,22)(20,23)(21,24)(25,28)(26,30)(27,29)(31,32) involution — undirected(1,3,4,12,6,11,5,13)(2,7,14,16,9,15,8,10)(17,19)(18,22)(20,27)(21,26)(23,29)(24,30)(25,31)(28,32)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31) involution — undirected(3,11)(7,15)(10,16)(12,13)(19,26)(22,30)(27,32)(29,31) involution — undirected(1,4,6,5)(2,8,9,14)(3,12,11,13)(7,10,15,16)(18,24)(22,30)(23,25)(29,31)A 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.