I myself used various amphetamines very often for the past 5 years. A 32 hour binge is really on the low end. I would say get around 8 hours of sleep, dont sleep more then 9 hours. Oversleeping as you mentioned makes people feel lethargic and overall not very good. Its certainly possible to make a close to full recovery with 7-8 hours of sleep. I dont think you will be full of energy or in a great mood. Sleep is only one part of recovery though. Its also dependent on what you ate prior, during, and after the binge. Ordinarily people eat very little when on amphetamines. Its important to rehydrate after your binge as well. The mix of low caloric intake, dehydration, sleep deprivation, and temporarily depleted dopamine will leave somebody feeling bad.
For quickest recovery i would suggest consuming a good deal of water or sports drink, not too much though, and eat some healthy food before you get some rest. Fruit is very beneficial for recovery as well.
Also consuming a multi-vitamin can help replenish the vitamins and minerals that were lost with dehydration.
recovery is different for everyone based on their health, nutrition, age, ect..
On a side note, i noticed that the more i abused amphetamines the harder it was to recover quickly. I believe that with my habitual use has made my body become very slow to replenish dopamine and serotonin after a binge.