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