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