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