Plot every piece of a piecewise defined function in another color?

edit

I don't think it's possible to take a single function and plot it with different colors. You could of course add a bunch of plots of the different pieces as separate functions. You might find the rainbow() function very useful for this, try

sage: rainbow?

for more information.

Or are you asking for this option as an enhancement request? Given your interest and username, I highly suggest you ask for an account at our Trac server (instructions there) and add this to the ticket for improving piecewise plotting. It would be a great way to start getting involved in the Sage community!