Mapping out end devices in an industrial network. They are all segmented on vlans. Is there an easier way then searching by MAC and trying to find the vendor?

I work for a processing plant, and everything is segmented on l2. The problem is there are a lot of devices connected and barely any documentation.

Are there any programs that can help identify these devices or how I can map this out easier? Right now I'm just looking at the mac address table.

I am responsible for drawing out the end devices and am overwhelmed. Anyone got any tips/suggestions