Um... you're gettting way ahead of the process.
There are four-ish steps to graduation.
We're currently in private beta, a week away from PUBLIC BETA, not "graduating". This is the equivalent of moving from kindergarten to first grade.
Graduation is a huge step and requires a lot of work. First, it requires that we spend at least thee months in public beta and we meet or exceed all of these metrics. Many sites stay in public beta (or just beta) for over a year before being made a full site (removal of the beta text) and even then have to wait months for a site design.
To make it even worse, some sites will never leave the beta phase, generally due to low usership and will never get a site design.
Note that the terminology for all of this has been in discussion on Meta Stack Exchange and is likely to change in the future.
So, we aren't getting a site design any time soon. Sorry.