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