I assume it would show up like a prefix before the persons name in server chat. 

"Oxide Group": "admin",
"Discord Role (Name or Id)": "829083887044919326",
"Sync Source (Server or Discord)": "Discord",
"Sync Notification Settings": {
"Send message to Server": true,
"Send Message To Discord": false,
"Discord Message Channel (Name or ID)": "",
"Send Message When Added": false,
"Send Message When Removed": false,
"Server Message Added Override Message": "",
"Server Message Removed Override Message": "",
"Discord Message Added Override Message": "",
"Discord Message Removed Override Message": ""

cant seem to get it to show up after a bit of changing the option choices.

How you have it configured is it will give players the admin role if have discord role with id 829083887044919326. What are you trying to do?

I wanted to show roles from the discord to the game. So Solaire with [owner] role in discord will show as [owner] Solaire : message, in chat

This doesn't display the tag in chat. It just grants an oxide group or discord role depending on your config. You need another plugin to handle the displaying in chat.