You can check out another question here on RG.

Alternatively, this article by Jose et al. has a nice and simpler staining protocol for bacteria cells, although you mihgt need to add a permeabilization step if looking for intracellular proteins.

http://ac.els-cdn.com/S0003269705005889/1-s2.0-S0003269705005889-main.pdf?_tid=1bc8919c-2db7-11e4-9a58-00000aab0f6c&acdnat=1409122699_9140a4813ac29f43168595f110dbd71c

https://www.researchgate.net/post/How_to_fix_bacteria_on_a_glass_slide_for_immunohistochemistry