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