Visualization of an Order Verified by Wilcoxon
I do not have a good way to answer your question since I do not know who your audience is, what actions/understandings are you trying to drive from your analysis, etc. 

I think that is where you need to start. If your audience is executives in charge of revenue, perhaps showing the difference in revenue where the top n preferences are in a car vs n-1, n-2, ....  Or frequency of the top preferences. 

Given the audience and the action/understanding you may not need to show all 42 preferences in the mainline of your presentation.

You can also look for inspiration on your audience/action from traditional statistical methods for this type of analysis.  Namely conjoint part of choice modeling. Take a look at some of those public analysis or classes and maybe an idea will take hold that is similar to your audience/action.

This is more of a path forward rather than an answer but I do not see the question as answerable right now.