You can always take the MTR. Cheap, convenient, quick. I believe you need to change from the airport train to a regular train (just follow everybody else when the train from the airort stops and everybody leaves).
Go to Bugis station. The hotel is in the same complex as the station itself, just walk thru the shopping center and the back entrance of the hotel is there. Around 2 or 3 min walk. Not sure if there is a train at 2 am.

At least you have something to see / do before you go back the next day.