A granular suspension is a colloidal system where the collisions between particles are inelastic. This introduces a mechanism for energy dissipation that adds to the friction with the solvent. Both of them are compensated by the Brownian random force, keeping the system in motion although out of equilibrium. In this work, we perform simulations of hard spheres with Langevin microscopic dynamics and various values of the restitution coefficient, and study both the structure and dynamics of the system for low and moderate densities and compare with theory in both cases. For the pair distribution function and structure factor, an equilibrium-inspired version of the rational function approximation is used for the comparison, with excellent agreement except at very low restitution coefficients. The dynamics is studied using the velocity autocorrelation function, which provides the diffusion coefficient and granular temperature, calculated theoretically with the Enskog equation at low densities. Notably, the structure and the dynamics show a non-trivial dependence on the restitution coeffient as well as the friction coefficient.