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