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