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