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