You can cycle or take bus to there!
For cycling, please rent your bike in Yat Tung Estate(price will be $80-100 per day). You will take about 1-1.5hrs ride to there(for beginner who know how to bike)
For bus, you can take S52 in Tung Chung Station and get off in Aircraft Maintanence Area and walk back for 5 minutes
Better arrive there 1 hour before Sunset, for me, around 1600 in Jan arrived there will be nice!