For Desktops, I don't believe you can. This is one of those things that, perhaps, is not a candidate for automation. Generally speaking, the only difference between touch and click on a desktop/laptop machine is the hardware drivers. The effect on the application is the same.
Currently, only Mobile applications in TC support the "Touch" action. So, you'll have to do that test manually for now.
Why automate? I do automated testing because there's only so much a human being can do and remain healthy. Sleep is a requirement. So, while people sleep, automation that I create does what I've described above in order to make sure that nothing gets past the final defense of the testing group. I love good food, good books, good friends, and good fun.