At present you have transferred, no departmental inquiry or criminal investigation has been initiated against you. If you want to challenge your transfer order then you must think again in the light of these facts :-
1. That allegation will go to your higher authority, because this was the sole reason of your transfer.
2. Then it is highly probable that that lady may amend her statement and can add more facts in her allegation. In current situation judges of the supreme court are facing these type of allegations from their staffs or interns, Justice Ganguly or Justice swantantra kumar are the best example. Even a serving judge of the Supreme court sent his request to remove his lady intern.
3. That lady may initiate criminal case against you for the removing her stigma or set her goal against you or for strengthen her allegation.
4. At present you are posted at another city so it'll be more panic for you to defend criminal case.
5. Departmental and criminal proceeding may cause more harm in compare to present.
6. Transfer is not treated as penalty.
7. Amendments in criminal provisions in regard of sexual harassment (case) are made to protect woman from any type of harassment at working place and even oral statement of the victim, without any medical or other documentary evidence is enough to convict any male person.