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