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