A3 hyperplane arrangement

This is an arrangement of planes in 3-space whose reflections generate the Coxeter group of type A3 with presentation

< s,t,r : s² = t² = r² = (st)³ = (tr)^³ = (sr)² = 1 >

The planes corresponding to the generators s, t and r are slightly larger. Can you find out which is which?

This object printed well without supports using a Prusa printer, even though it has some overhangs.