HI Kevin,
It can be done by the custom white balance setting, because if your whites are off then so are the rest of the colours. Use a white piece of paper or get hold of a WB card (cheap at Jessops) place it near what your taking an Image of, fill the frame of the white paper. (Does not have to be in focus) take an Image of the paper and then go to your WB settings on your camera (refer to your manual) select custom WB and then select the Paper you have just taken an image of. Then take an Image of the subject. And there you have it. Compare the one with and without and you will see that you have that boosted saturation. As you want to do it all in camera then shoot in JPEG as you'll have that sharpnes compared to RAW.
And if you want even more saturation, as mentioned above then see if your camera has settings like vivid. Also If you do decide to edit in photoshop and take the image to another level, then LAB is the best for colour alterations, you can use hue/sat in RGB but its old school and you have better transitions in LAB.

If you struggle give us a shout.

Hope you had a great Xmas.

PS. If the lighting conditions change then you have to do another custom WB or you will have some very different results. Also have a play with the WB settings In the camera, like daylight or tungsten you might like what they come up with.