Heat map plot using conditional formatting
Save the file as csv and load back to get rid of pivot table format, but reorganized data.
Now we can conditionally format the cells. In 2003 we can conditionally format only to three levels. If you want to hide number in the cells, select the color for text exactly same as the cell color.
In Excel 2007:
The result would look like the following. You can print the plot as pdf or take a screen shot of it.