His white suit from the same fabric as that of any agent's, cut by the very same top tailors who had made his own suites.

suit from -> suit came from OR suit was made from
suites -> suit (if Xavier has only one official suit for his work as an agent) OR suits (if Xavier has more than one such suit)

The suits that agents and mid-level officers wore though, not black, not white.

not black, not white -> were neither black nor white