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