  We study the discovery potential of massive graviton-like spin-2 particles
coupled to standard model fields, produced in photon-photon collisions at the
Large Hadron Collider (LHC) as well as in electron-positron ($e^+e^-$)
collisions, within an effective theory with and without universal couplings.
Our focus is on a massive graviton G coupled to the electromagnetic field,
which decays via $\mathrm{G}\to \gamma \gamma$ and leads to a resonant excess
of diphotons over the light-by-light scattering continuum at the LHC, and of
triphoton final states at $e^+e^-$ colliders. Based on similar searches
performed for pseudoscalar axion-like particles (ALPs), and taking into account
the different cross sections, $\gamma \gamma$ partial widths, and decay
kinematics of the pseudoscalar and tensor particles, we reinterpret existing
experimental bounds on the ALP-$\gamma$ coupling into G-$\gamma$ ones. Using
the available data, exclusion limits on the graviton-photon coupling are set
down to $g_{\mathrm{G}\gamma\gamma}\approx 1$--0.05~TeV$^{-1}$ for masses
$m_\mathrm{G} \approx 100$~MeV--2~TeV. Such bounds can be improved by factors
of 100 at Belle~II in the low-mass region, and of 4 at the HL-LHC at high
masses, with their expected full integrated luminosities.
