Mmm...yes and no. Most of the pics in the standards are old, dark and outdated. In this time of technology the IBC should be able to have computer diagrams done up as well as better clearer pics of fish and anatomy.
I think there should be labelled diagrams in the standards showing where and how everything is measured. They really need all the new interest they can get. The easier they make it to figure out what the standards are and what breeders should be breeding for the more people will show long term interest.
Hopefully the IBC is setting its focus on modernizing and attracting new interest. IMO betta breeding really is fun but I probably have a better attention span than most people thinking about taking an interest. I have done A LOT of research. I have read countless papers, blogs, websites, etc. trying to increase my knowledge. Most people casually thinking about getting into a hobby aren't going to put that much effort in it.
To answer the OP, the way I did it was I made my own diagram. I printed out a drawing of a show plakat, read through the standards and filled in the areas on the drawing with dimensions and measurements. I keep that handy when I'm looking at breeding stock so I don't forget anything.