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