Answer
The diagram will be
Work Step by Step
--The 3-cube on the right corresponds to w;
--the 3-cube given by the top surface of the whole figure represents x;
-- the 3-cube given by the back surface of the whole figure represents y;
--the 3-cube given by the right surfaces of both the left and the right 3-cube represents z.
-- In each case, the opposite 3-face represents the complemented literal.
-- The 2-cube that represents wz is the right face of the 3-cube on the right;
-- the 2-cube that represents xy is bottom rear; the 2-cube that represents y z is front left.
