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