The Sentence Diagram Generator visually represents the sentence "I will go to school after I see the doctor." as follows:

          +-----------------+
          |       will      |
          |                 |
          |       go        |
          |                 |
          +-----------------+
                | 
                | 
                +-----------------+
                |       to        |
                |                 |
                |     school      |
                +-----------------+
                |
                +-----------------+
                |      after      |
                +-----------------+
                      |
                      +-----------------+
                      |        I        |
                      +-----------------+
                      |        see      |
                      +-----------------+
                      |      the        |
                      +-----------------+
                      |     doctor      |
                      +-----------------+

This diagram illustrates the main clause "I will go to school" and the subordinate clause "after I see the doctor," highlighting the relationships between the components of the sentence.