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