Here is a simple and nice planet generator.
You can add hives with a image edition program just turning some spots dark grey or something alike.
"In what vessels did they pour forth their polluted essences, in what form did they hope to subjugate the universe, with whose hands do they, even now, reach across the frontiers of space in vain aspirations of conquest? It is both obviously and painfully clear that it is WE who they venerate they wish nothing more than to be like us, to be like Him whose children they envy."
~Reclusiarch of the Eagle's Heirs to Lord Inquisitor Uxoris
On the Supremacy and Virtue of Humanity