The Sentence Diagram Generator visually represents the sentence "The Martians abducted my best friend and zoomed away to Omega" as follows:

                 +---------------------+
                 |        and          |
                 +---------------------+
                 |                     |
          +------+-------+     +-------+-------+
          |   abducted   |     |     zoomed     |
          +--------------+     +---------------+
          |              |     |               |
     +----+----+    +---+---+   |        +-----+-----+
     |   The   |    |  my   |   |   away  |    to    |
     | Martians|    | best  |   |         |  Omega   |
     +---------+    +-------+   +---------+-----------+
                     | friend  |
                     +---------+

This diagram illustrates the main verb phrases and their respective subjects and objects, showcasing the grammatical structure of the sentence.