First off, Congratulations on changing your own life and for your own continued sobriety. I personally would keep in mind that their exposure is most likely to the worst of the worst addicts, the ones who are hurting and losing their children. It's hard not to have contempt towards people who hurt children, addicts or not. However, I personally would slip in success stories here and there. I would try to educate them some on addiction.
I don't think you should take it personally b/c the people they are seeing as the addict I am betting you hold contempt for also. Without knowing how close you are to your coworkers it's hard to know what is the right step to take. If you are all fairly close then I would bring up that you overcame addiction in your own past and that it is hurtful to hear, however that you understand some of the contempt they hold for those who hurt the children in your care.
No matter what, don't let anything anyone says minimize your own success.