In a medium bowl, mix together the cream cheese and cocktail sauce until well blended. Stir in crabmeat, Swiss cheese, and green onion. Spread about 1/2 cup of the mixture onto each tortilla, and roll up tightly. Wrap each tortilla in plastic wrap, and refrigerate overnight.
Slice rolls into 1/2 inch circles, and arrange on a serving tray with a bowl of cocktail sauce for dipping.