Cast on showing on right side

When I cast on for the sleeve, the cast on edge is showing on the right side, how can I cast on so that the cast on edge is on the wrong side? The sweater I am knitting is the Green Gables Hoodie from Vogue Fall 2008. Thanks!

You don’t cast on any differently, but do your first row as a WS row, if you did it as a RS row this time.