Basically, the same rules apply whether you want to hit a draw or a fade—all you have to do is the opposite to produce the desired result. First notice how my clubface is aiming straight down the line at the target and how my body lines (feet, waist, shoulders) are aiming either slightly to the left or right. From there, I swing along my body lines.
I keep my clubface where it is but swing as if I’m hitting the ball to the left or right. This starts the ball out to the left or right and then, because the clubface is aiming straight, brings the ball back on that line. Nothing fancy here, just a sound setup that produces a curving ballflight.