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)(19,23)(20,21)(22,24)(25,32)(26,28)(27,31)(29,30) involution — undirected(2,5)(6,8)(11,16)(13,15)(17,19)(18,23)(20,28)(21,26)(22,25)(24,32)(27,30)(29,31) involution — undirected(9,11,12,16)(10,13,14,15)(17,20,21,18)(19,23,26,28)(22,29,30,24)(25,32,27,31)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(18,20)(19,25)(22,30)(23,31)(26,27)(28,32)(2,5)(6,8)(18,20)(23,28)(24,29)(31,32) 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.