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