The sign I have seen in use is the same as the sign for TURBAN. You can view this sign at this website:
https://www.handspeak.com/word/search/index.php?id=2710
I suggest that you make acquaintance with deaf persons who follow this particular religion and you can learn the signs in use among practitioners of this religion. In my experience there isn't widespread knowledge within the deaf community of this eastern religions but I am sure their are small pockets of individuals within the community who are practitioners and would have the ability to talk about the practices and beliefs within this system of religion.
Regards
Bill