  Recent experiments have shown that proximity with high-temperature
superconductors induces unconventional superconducting correlations in
graphene. Here we demonstrate that those correlations propagate hundreds of
nanometer, allowing for the unique observation of $d$-wave Andreev pair
interferences in YBa$_2$Cu$_3$O$_7$-graphene devices that behave as a
Fabry-P\'erot cavity. The interferences show as a series of pronounced
conductance oscillations analogous to those originally predicted by de
Gennes--Saint-James for conventional metal-superconductor junctions. The
present work is pivotal to the study of exotic directional effects expected for
nodal superconductivity in Dirac materials.
