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