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