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