I've had a couple jobs where I've done 32 or 36 hour weeks in the past as well.
But I also have a strong reputation in my field so I'm able to leverage a bit of personal branding ("I'll get more done in 32 hours than anyone else you can hire for 40.")
That may be a tough sell for you at this point. But as others have pointed out, contracting may be a good fit for you if you want to work less. My advice if you go this route is to come up with the highest hourly rate you think you can ask for, then ask for at least 25% more (in the US I'd suggest asking for at least $75 per hour even if you don't have much experience).