Here are my thoughts on the subject:
Settings would probably help. If you haven't already, read the manual and see if there are settings like "vivid" or something similar and play around with them to see how the various settings affect the photo. Also, pay attention to your lighting. Bright, harsh light tends to wash out colors. Indirect/diffused or ambient light might help a bit. Also, make sure the exposure is correct. Overexposure also washes out colors.
It might also help to post some example photos with the EXIF data. That way folks on here can see what your settings are and give suggestions if they see areas for improvement. That might also help us see if it's an exposure issue or lighting, ect.