The way I see it, you would have the four charts right next to each other just as they are in Minitab. I bet Excel could reproduce them exactly. Then you just select the four charts together and paste them as an image in your thesis. You can group them together to make selecting them easier.

What's the problem with the visual appeal of the Minitab chart? I like it. Very simple, concise. Granted, there's not much one can do to prettify in Minitab though there are some things that can be done using the graphing toolbars.