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Three holes have to be cut -- one for the sprayer, one for the valve and one for the faucet. Lay tape down to protect the surface when you drill and then find the center of the area and mark it.
Determine the outside edges of the area by using the base of the sprayer as a template (Image 1). Find the center between the outside edges. Measure the base of the faucet (Image 2). Take half of that measurement, mark the tape and do the same for each hole.
Take the tip of the hole saw and line it up with the center of the mark and start nice and easy. Don't push too hard. Let the drill do the work. Tip: A 1-1/4" hole saw was used to accommodate the supply line on the faucet.