Use whatever schematic designer of your choice to draw it.
Then do a "print screen", open MSpaint or photoshop, do a "paste" and copy only the part of the image you want and paste it as a picture in PowerPoint.
Very easy and works with the software you use.
You still don't have the hang of it, eny way the default stencils that come with the installation of visio are not great, but there is a wealth of free stencils on the net why not google them!
And visio is just a diagraming tool it can't make a pcb layout or enything else, what it can do is help you draw circuit schematics fast, and trouble free.