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)(17,18,20,22)(19,23,24,21)(27,31)(29,32)(1,2,4,5)(3,7,8,6)(9,11,13,16)(10,12,14,15)(17,18,20,22)(19,21,24,23)(2,5)(6,7)(10,14)(12,15)(17,18)(19,21)(20,22)(23,24)(25,26,28,30)(27,29,31,32)(1,2)(3,6)(4,5)(7,8)(9,12)(10,11)(13,15)(14,16)(17,18)(19,21)(20,22)(23,24)(25,27,28,31)(26,29,30,32)(1,3)(2,6)(4,8)(5,7)(9,11)(10,12)(13,16)(14,15)(17,19)(18,21)(20,24)(22,23) involution — undirectedA 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.