Boil cubed potatoes until they are tender. Drain and cool. In a large bowl add celery, onion, 2 eggs and pickled relish. Add the salad dressing, yellow mustard and sugar. Stir well. Place the sliced egg on top of potatoes and sprinkle with paprika and salt. Let the potato salad chill in the refrigerator for 2 1/2 hours or overnight.