Well the white one is energy, I think theres a thin purple one for body, red is shell, yellow is poison, blue is venom, light blue is virus countdown... and I think waste is also light blue... and I can't remember wich color slime has... maybe green.
The V like shape is the bots "logo", the arrow coming out of the bot is a movement arrow, it means the bot is spending energy trying to move in that direction.
You'll also see ties at some point, wich is a connection between 2 bots. When bots reproduce you see a birth tie, but these can also be created and hardened to create multicellular organisms.
Theres a lot of information about the bots and what you can do with them on the Wiki page. And there are 3 league you can create a bot and compete in if you want. (This could also be a way of learning more about how the bots work)
You should probably start out making something for the F3 league then move to F2 or F1 when you want to try using more tools.
Theres also a god tutorial bot on the Wiki, and many of the bots with short names in the F3 league are considered tutorial bots. It's the same bot with 1-2 genes added for each step making it easy to tell wich genes do what and how big the difference is when running them against eachother. (Large complex behavior will often be overtaken by even the simplest of behaviors, so a single gene can make a huge difference. If you want to take positions in the F1 and F2 league you should try to keep your bot as simple as possible while improving it.)
Not sure how the graph data is saved and extracted, but I can imagine you might have to pick up the source and create your own procedure for saving the data in the right format (Unless ofcourse it's saved in a readable format)