They can go to: http://youriphere/~theirusernamehere/
The IP and user name assigned to a domain can be found in WHM under Account Information, List Accounts. In fact, under List Accounts, you can simply find the client's domain and next to that is the client's IP. The IP listed is actually a link to http://youriphere/~theirusernamehere/.
Tip: You can right-click the IP and choose Copy Shortcut or Copy Link Location, and then Paste the link in an email or chat.
