Want to customize the PayPal Button in my Shopify Cart Page

[Mywherehouse]

I have integrated "Express Checkout" in Shopify. As a result, a default Paypal Button shows up in my cart.

I would like to change how the Button looks to something that will cause less confusion to my customers.

The image below is the default Paypal Button in my cart. I would like to change it to the image below it.

I want my PayPal button to look like this.

Any help would be greatly appreciated.

Thanks in advance