R how to visualize confusion matrix using the caret package

I'd like to visualize the data I've put in the confusion matrix. Is there a function I could simply put the confusion matrix and it would visualize it (plot it)?

Example what I'd like to do(Matrix$nnet is simply a table containing results from the classification):

Confusion$nnet <- confusionMatrix(Matrix$nnet)
plot(Confusion$nnet)

My Confusion$nnet$table looks like this:

    prediction (I would also like to get rid of this string, any help?)
    1  2
1   42 6
2   8 28