Unfortunately, the specification of DC resistance (50 ohms) doesn't say whether that is for half a winding or a whole winding.
I think you were saying I should use 4, one going from the red wire to the blue wire, red to pink, red to yellow, and red to orange. Is that correct? In what orientation? (I have not used diodes yet...) Is my picture correct in connecting +5V directly to the red wire of each motor? Thank you!