For industrial work in the USA, ladder diagrams are the "standard". I suggest googling "how to draw ladder diagrams".
Now there are many conventions around the world for automation drawings but I really prefer the practice in the USA. In my opinion the approach used in Europe is crap, even more so the wire number scheme makes maintenance a nightmare.
What mathers is who and how made the diagrams. You can get shitty diagrams in both standards. I can say that i have no problems with good American (or Japanese) ones. It's only a way of presentation, if they are properly drawn, both are similar, you just have to switch it in your head. Numbering (components, wires, terminals, cables, etc.) scheme is more up to the constructor itself then the US vs EU style...
Of course I make only IEC based diagrams as i am in europe, i don't even have a software license for the NEC ones... You would be surprised how quickly you can navigate through the IEC ones if they are made properly...
I use SEE electrical from Ige-xao, as it was the most economical option when i started, it's great for what i need. I worked with WSCAD when i was employed, but this is a different price range...
For someone who needs software for really small projects, i would recommend DesignSpark Electrical, it's free for up to 15 pages.