Rather than don a black suit for the job, he put on a shiner version of his traditional red, blue and yellow costume.
Despite rarely being advertised as one of Justice League’s leading heroes, most folks knew that Superman would be back in action during the movie.
As far as the DC Extended Universe canon goes, that particular fashion choice has been tossed aside.
This was accomplished by bringing Superman’s body back to the Kryptonian ship in Metropolis and using its technology with one of the Mother Boxes, he was successfully resurrected.