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