Assuming eight divisions of ten teams (one of which being the top ten teams from the G5), it could look something like this for a hypothetical 2024 season:
Atlantic Division: Clemson, Duke, Florida St, Georgia Tech, Maryland, North Carolina, NC St, South Carolina, Virginia, Wake Forest
Central Division: BYU, Colorado, Iowa State, Kansas, Kansas State, Missouri, Nebraska, Oklahoma, Oklahoma State, Utah
Eastern Division: Boston College, Miami, Notre Dame, Penn State, Pitt, Rutgers, Syracuse, Virginia Tech, UCF, West Virginia
Midwest Division: Illinois, Indiana, Iowa, Michigan, Michigan State, Minnesota, Northwestern, Ohio State, Purdue, Wisconsin
Pacific Division: Arizona, Arizona State, Cal, Oregon, Oregon State, Stanford, UCLA, USC, Washington, Washington St
Southeast Division: Alabama, Auburn, Florida, Georgia, Kentucky, LSU, Miss State, Ole Miss, Tennessee, Vanderbilt
Southwest Division: Arkansas, Baylor, Cincinnati, Houston, Louisville, SMU, TCU, Texas, Texas A&M, Texas Tech
G5 Division (Using Final 2023 FPI): Air Force, App State, Boise State, James Madison, Liberty, Memphis, South Alabama, Toledo, Tulane, UTSA
Tried to keep pre-realignment conferences together as much as possible. Sorry to Cincinnati and Louisville for getting dumped onto an island, but at least the Keg of Nails is alive and well.