  In a recent Letter, we have pointed out that the linearized Einstein gravity
in de Sitter (dS) spacetime besides the spacetime symmetries generated by the
Killing vectors and the evident gauge symmetry also possesses a hitherto
`hidden' local (gauge-like) symmetry which becomes anomalous on the quantum
level. This gauge-like anomaly makes the theory inconsistent and must be
canceled at all costs. In this companion paper, we first review our argument
and discuss it in more detail. We argue that the cancelation of this anomaly
makes it impossible to preserve dS symmetry in linearized quantum gravity
through the usual canonical quantization in a consistent manner. Then,
demanding that all the classical symmetries to survive in the quantized theory,
we set up a coordinate-independent formalism \`{a} \emph{la} Gupta-Bleuler
which allows for preserving the (manifest) dS covariance in the presence of the
gauge and the gauge-like invariance of the theory. On this basis, considering a
new representation of the canonical commutation relations, we present a
graviton quantum field on dS space, transforming correctly under isometries,
gauge transformations, and gauge-like transformations, which acts on a state
space containing a vacuum invariant under all of them. Despite the appearance
of negative norm states in this quantization scheme, the energy operator is
positive in all physical states, and vanishes in the vacuum.
