The style used for creating documentation depends upon the goal of the drawing. When I create a "Schematic", I try to make the drawing useful for Troubleshooting and understanding the function; Visual likeness to reality is intentionally not part of my thinking. When drawing a "Wiring diagram", more thought goes into making the physical reality clear, especially for Enclosures, wire and cable routes. For board level drawings, I use sort of a hybrid approach where the physical layout is a small factor in that the IC's are drawn as a box and kept as 1 unit in the drawing.
The approach I would use for your question would depend again on the type of drawing I was creating. If it's a location diagram, then draw the IC as it appears in real life. If it's a schematic, the simple approach would be to draw it as a box with no regard for Physical accuracy. Then draw lines terminating at, or slightly within, the edge of the box. Add numbering either just inside or just outside the box. The lines need not be in the same order as they are on the IC. Draw them whatever way is most useful.