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