Vertex labels versus vertex names in VertexRenderingFunction
You could import it first and modify options:
g = Import["D:/dev/ProjectEuler/keylog.gv"];
SetProperty[g, {EdgeStyle -> Black, VertexShapeFunction -> ({EdgeForm[Black], White, Disk[#1, 0.08]} &),
VertexLabels -> (#1 -> Placed[#2, Center]) & @@@ (VertexLabels /.
Options[g, VertexLabels]), GraphLayout -> "SpringEmbedding"}]