It isn't actually bigger. It only appears bigger in that projection.
I know that's true for the actual tesseract, but I'm referring to the 2D representation.
Anyway, I think I have my image finished.
The inner cube is on the inner most circle, the outer cube is on the outermost circle, and the intermediate faces are in the middle circle. Each face on a circle is adjacent to its two neighbors on the circle. Lines within a circle of the same color mainly connect other points on that circle, but when a line passes through a face on another circle, it also connects that face to the face at each end of the line. So, some lines do double duty, which reduces the number of lines that go from some faces. Lines that go between two circles that are each a different color than the line just connect individual pairs of faces on the two different circles.
I know that's true for the actual tesseract, but I'm referring to the 2D representation.
Anyway, I think I have my image finished.
The inner cube is on the inner most circle, the outer cube is on the outermost circle, and the intermediate faces are in the middle circle. Each face on a circle is adjacent to its two neighbors on the circle. Lines within a circle of the same color mainly connect other points on that circle, but when a line passes through a face on another circle, it also connects that face to the face at each end of the line. So, some lines do double duty, which reduces the number of lines that go from some faces. Lines that go between two circles that are each a different color than the line just connect individual pairs of faces on the two different circles.