Select Visualize --> Map now and you'll still get a map with points on it. To change this, click on "Configure styles" and then choose "Fill color" under "Polygons."
You can then choose either Gradient or Buckets. Gradient allows you to select one color and the number of slices of your data -- here, the data is divided into four groups, and Fusion Tables colors the map from light (lower) to dark (higher) green. Buckets gives you more options in the range of each group and use of multiple colors.
If you've got more than one data column, you'll need to select the one you want to visualize.