I would try to find images or icons that would represent characters or specific relationships in the book. For example what symbols or objects could be used to represent Macbeth, Lady Macbeth, the Witches? Trying to find these images and then being able to explain how they connect the characters can help display your understanding of them and allow you to post on a visual what you believe. What object or symbol could be used to describe the relationship between Lady Macbeth and her husband? Could there be objects used to describe their relationship at the start of the play and then at the end of it? What object could be used to represent Macbeth's beliefs in his soliloquy, "Tomorrow creeps in this petty pace"? These might help you get a start on this task.