Is an infographic resume suitable when applying for a position? I'm currently looking for graduate training programs, supply chain, buying, and marketing positions.
Unless you're looking for a job making Info-graphics, don't do it.
There are accepted practices for resumes and CV's because it allows HR professionals and hiring managers to swiftly look them over and pass them on or eliminate them. While you may get some attention with an info-graphic, you're more likely to annoy those reading it and get it thrown out.
Remember, anything that interrupts a potential employer's workflow creates more work for them and doesn't bode well for you.
It's a gamble, unless (as Christopher Estep points out) you're looking for a job making Info-graphics.
If HR and the hiring managers are looking at a stack of 100+ resumes that all more or less look the same, you'll stand out. Whether that means you'll get more consideration or be tossed aside is the gamble.
You mentioned marketing positions - showing you know how to stand out from a crowd and get noticed may be useful.
A big challenge will be to come up with an info graphic that is on topic, useful, and information-dense. A successful graphic would show that you'd be a good fit for the position even without your design skills. That's a difficult feat.
If the company uses some sort of HR keyword searching program, your application will probably do poorly - keyword searching programs rarely deal with images well.