In a large mixing bowl, pour in heavy whipping cream. Beat with hand mixer until fluffy.
Add the sugar and combine very well using a silicone spatula.
For the bottom layer, arrange the graham crackers first in the baking dish. Spread the desired amount of cream, then followed by the mangoes and fruit cocktail. Top again with cream, then graham crackers. Repeat this process up to 3-4 layers or more, ending with mangoes and fruit cocktail. Sprinkle with graham cracker crumbs.
Refrigerate at least 4-6 hours before serving.