It probably depends on what distance you are training for. If it's 100m or less, then youll be working for less than 15 seconds and it will be all ATP-PCr. To me, it would make sense to train the squats in sets for that same length. This would probably mean
heavy squats for about 4-6 reps, or lighter weight "
speed squats" for about 10-12 reps.
Personally, I know lower-rep heavy squats have greatly improved my sprinting ability in distances of 100m or less. You could try throwing in box squats and too.
If you're looking to recover faster between sprints, then shorten the rest time between your squat sets. I guess I'm a little confused as to what you're trying to improve on with this.