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