The challenge with Bayes’ illustrations is to simultaneously.show 1) relations 2) ratios. The suggested approach works well. I am suggesting to combine Venn diagrams and Pie charts:
http://oracleaide.wordpress.com/2012/12/26/a-venn-pie/
Happy New Year!
A Venn Pie chart is very intuitive and shows ratios better than Venn diagrams: http://oracleaide.wordpress.com/2012/12/26/a-venn-pie/