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