You can make this base mixture in advance of a party without the club soda. When whenever your guests arrive, add the club soda and serve the punch over ice with the apple and nutmeg garnishes.
To make your own simple syrup, combine 1 cup of white granulated sugar with 1 cup of water, and heat the mixture over the stove until the sugar has fully dissolved in the water. When the sugar is completely dissolved in the water, turn off the heat and allow the mixture to cool down until you are ready to use it.