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