She probably has more styles turned on that contain colors or has extra colors saved to her personal style or other referenced styles. (not all styles have colors and some of them have overlap with colors in other styles)
To turn on more styles go to the Customize menu and select Style Manager. In the Style Manager click the Styles button on the right.
You can also add your own colors to your personal style or any style you have write access to. That can be helpful if you find yourself creating certain colors often. You can do that through the Style Manager, too, or from the More Colors dialog.