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