Put the first 5 ingredients in the shaker and shake vigorously. Now fill the long drink glass with some ice and let the syrup run over it. If you then carefully fill the glass with the contents of the shaker, you get a great transition and at the same time have a great foam!
Personally, I like this variant best. The ice prevents the two liquids from mixing. If you like, you can of course mix the cocktail with all the ingredients immediately, then it will turn pink and will not have the same effect as e.g. with Tequila Sunrise.