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