In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth and creamy.
Add the powdered sugar and vanilla extract to the cream cheese and mix until well combined.
Gently fold in the whipped topping until the mixture is light and fluffy.
In a separate bowl, combine the sliced strawberries, blueberries, and raspberries.
Pour the cream cheese mixture over the berries and gently fold until the berries are well coated.
Chill the salad in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.
Serve the salad in individual bowls or a large serving dish, and sprinkle the crushed graham crackers on top for garnish.