If you decide to keep the existing chain when changing to the larger 32T cassette it is imperative that you make very sure that it is long enough by confirming the ability to easily shift into your big ring-big cog combination without straining anything.

Do this by pedaling by hand slowly, with the bike on a stand or upside-down; STOP if anything gets tight. If all is well then make your B-screw and other derailleur adjustments.