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