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