Keen to understand the idea of a 'truthmaker' better, I ran Google images to find a picture of one.
The result wasn't helpful. There were lots of pictures of a book by D.M. Armstrong, an astoundingly witty and tasteful picture of a man's stomach tattooed with a picture of a cat, with the cat's bottom where his navel was, but nothing to do with truthmakers. Also a picture of Ronald McDonald, and even a picture of Bill Vallicella's friend Peter Lupu.
So we have no picture of a truthmaker, as yet. I think the problem is similar to the one faced by cartoonists who want to represent motion. A still picture is by definition without movement. Similarly the linguistic representation of truthmaker is is by a noun-phrase, and thus by definition lacking the 'doing-ish' content signified by the verb.
Perhaps a cartoon representation of a truthmaker would work? What would be the equivalent of the 'zoom' and the lines representing the space-time trail of Billy Whizz?
More thought needed.