How do I get the image of the UIContextualAction button to display properly?

Question

I made an image for the button of a UIContexualAction using sketch but when I loaded the image onto a tableViewCell, the image turned out like below.

This is the code that was added to the UIContextualAction.

       let action = UIContextualAction(style: .normal, title: "Guestlist") { (action, actionView ,completion) in

        completion(true)
        }
    action.image = #imageLiteral(resourceName: "GuestList")
  //  action.backgroundColor = .purple
    return action
}