The definition of a draw is starting the ball to the right of the target and then curves back towards the target, which is also useful if you have an obstacle in your way like a tree for instance.
Start by aiming slightly right of the target with your shoulders hips knees and feet aiming parallel left to where you want the ball to start.
As you begin your back swing, your shoulders continue to turn, your arms must swing up and inside of the arc, maintaining your posture throughout the back swing.
As you begin the down swing the first thing you want to focus on is that the right arm begins to straiten out immediately, that's what creates club head speed. Keep your right shoulder back as long as possible, this will cause the club head to 'close' on impact which creates a draw. Your right arm crosses over your left arm as the golf club reaches the bottom of the arc.
Don't forget the follow through, after impact turn your left hip left out of the way and as you reach the top of your follow through your right arm will have completely crossed over your left arm.
To summarise, what you are trying to achieve is an in to out swing arc that will start the ball out to the right of your target. The closing of the club head on impact will put a right to left side spin on the ball which will make it curve back toward the target.
Start on the range by lining up square to your target as you normally do, then just pull your right foot back slightly. This is a good way to start, then progress to the steps I've outlined in this chapter.