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