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