You can also look at the David Sonnenschein book Sound Design: The Expressive Power of Music, Voice and Sound Effects in Cinema. The first 25 pages gives you a really good idea of what to look for and how to listen to your script and make notes.
Within the first 25 pages, Sonnenschien recommends that you take the script, whatever the version and read through it, mentally jotting down the sounds that you start to hear in your head.
Then, he recommends for a second read through that you start to pencil in ideas for ambience, environmental transitions, sounds for different objects, people and actions, identifying key words that will assist in clues for emotions and moments of physical and/or dramatic transitions. He also recommends sighting explicit sounds writing into the script such as a car horn, a school bell ringing etc. He also highlights the importance of noting phrases within the script that can generate potential sounds for dramatic effect and how to identify phrased clues for emotions.
After you have identified these sections, he recommends grouping all these "voices together" and to find the polar opposite of these words or phrases within these voices. After that is done, he suggests drawing visual maps based upon these thematic polarities and where they spike and dip within the narrative from the beginning to the end.
I really do recommend reading the entire book because within each chapter, he highlights the different elements that make up the sonic landscape and how you can put together a map for the on set and post production journey.
