1. I graduated from X university.
2. I am a graduate of X university.
3. The past or future tenses are most common.
4. I graduated with a BSc in chemistry from Oxford University in 2004 with first-class honors
EDIT: Is this sentence grammatically correct?
"He is graduated high school diploma of non-formal education course from the Non-formal Education Centre under the Office of Non-formal Education of XXX Province on 18 March 2003 with the following school record."
No. Frankly, it is a mess.
Interested in Language