I just want to be sure I understand the problem correctly. When you talk about the resolution, do you mean the resolution of the screen on the camera, or the resolution of the photos? If you are talking about the camera screen, there are no settings to change that. It will not affect the outcome of the photos. Your 8mp camera might have a higher resolution screen than the IXUS 132, or maybe a different screeen size. Neither gives a true image of the final JPEG on the camera screen, just an approximation of the final photo.
If you are talking about the resolution of the photos themselves, there are some modes that reduce the resolution for such things as low light photos. If you change the resolution in the menu to L, it should give you 16MP photos, which are pretty high resolution when you are using most scene modes. Don't judge the photos by the camera screen, since all camera screens are different resolutions than the cameras themselves. How do they look on the computer screen? That would be a better way to decide about the quality of the images.
