Please see my comment above. You can use the language of gravitons and Feynman diagrams even for classical gravitational physics, but the calculations will be i

Please see my comment above. You can use the language of gravitons and Feynman diagrams even for classical gravitational physics, but the calculations will be intractable for strong fields. See https://en.wikipedia.org/wiki/Graviton#Gravitons_and_renormalization https://en.wikipedia.org/wiki/Graviton#Gravitons_and_renorma... for example