The faces of the polyhedron are intersecting cubes. The edges of any cube are 6 squares.
But since the model of our polyhedron is hollow (empty) inside, squares should also be used with the central part removed.
The combination of 18 intersecting squares (6 black, 6 red and 6 yellow) gives us such a polyhedron.
The combination of three cubes This is avant-garde and constructivism. The polyhedron of Malevich and Mayakovsky. It combines the main colors and shapes of avant-gardists.It could be part of the scenery for plays about the creators of the new world.Or a worthy exhibit next to a black and red square.
Detailed assembly from Andrei Lomakin (youtube channel - Sekretmastera)
Detailed assembly from Alexei Zhigulev (youtube-channel - Origami)