Receptor-Ligand R-package for visualization
Two nice tools for receptor-ligand interaction analysis are:


CellPhoneDB by the Teichmann lab, although this is not an R package...
NicheNet by the Saeys group


Note that these tools are mainly meant for analysis of receptor-ligand interactions, although I think NicheNet also has some visualization options. CellPhoneDB needs to be run from a shell, but the results can easily be imported into R for visualization. You might check the papers on these 2 methods for some ideas of visualization. Combining Seurat's visualization options and ggplot2 should get you already pretty far.