So after installing, when placing anything that requires power the ground turns bright blue with only rocks plants and ores sticking through. I cannot see any difference between land and water, and things like the orange box around roboports are under the blue, so very hard to know if they are overlapping or gaps between.

Is there a way to get the color more back to the default?
Could it be because I am using 8 as the multiplier?

I have it set on 8 thinking that would give me the max size. You say 128X128 is max but I am not sure what multiplier I would need to get that.

It looks like it is due to overlap and the color multiplies itself instead of only getting so blue. Well I guess neon blue is still blue.

Your second comment is correct—you have too many overlapping electric poles. The mod doesn't change any colors.

If you want to use a really big multiplier, then you might want to remove most of the redundant electrical poles from your world.

I have it set on 8 thinking that would give me the max size. You say 128X128 is max but I am not sure what multiplier I would need to get that.

A multiplier of 8 will make the Substation capped at 128x128.
It's simple multiplication: Substation is normally 18x18. Multiply that by 8: 18*8 = 144, which the engine caps at 128.

If you want even the Small electric poles (normally 5x5) to be 128x128, then a multiplier of 25.6 will give you that: 5*25.6 = 128.