Bounded-orbit lattice representations of finite groups

For a finite group $G$, let $λ(G)$ denote the minimum number of orbits on the elements of a finite lattice $L$ with $\operatorname{Aut}(L)\cong G$. Babai and Goodman conjectured that $λ(G)$ is bounded by an absolute constant. We prove that $λ(G)\leq 50$ for every finite group $G$, thereby confirming