In a large bowl, toss the chex cereal, pretzels, peanuts, and grahams together. Set aside.
Add the butter, peanut butter, and maple syrup to a microwave safe bowl and microwave for 30 seconds. Remove from the microwave, stir, and then return to the microwave to heat for another 30 seconds. Stir and pour over the cereal mixture. Toss and pour onto a baking sheet.