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