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