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