PopART is a free, easy to use software. I would suggest you to read its instructions, too (http://popart.otago.ac.nz/doc/popart.pdf). Since the first time I had some troubles in understanding how to deal with the different colors in the network (to say it simply, when you want each haplotype to have different colors). But the manual is well done and the software works smoothly (turns out you simply had to specify everything in your "traits" file).
If you have any issue with that, you can write here again!