Advancing Cybersecurity Diagnostics and Mitigation Act This bill amends the Homeland Security Act of 2002 to direct the Department of Homeland Security (DHS) to: (1) deploy, operate, and maintain a continuous diagnostics and mitigation program to collect, analyze, and visualize security data and cybersecurity risk; (2) regularly deploy new technologies and modify existing technologies to improve such program; and (3) develop a comprehensive strategy to carry out the program. In carrying out the program, DHS must ensure that cybersecurity risk information, assessments, and analyses are provided in real time and program information is available to the DHS national cybersecurity and communications integration center.