Thinking about jobs after graduation, it's more difficult looking for graduate/junior jobs, and existing ones require an extensive amount and range of experience. But there are many websites that you can search for jobs, here I have found some tailored to creatives.
Creativejobs.co.uk
http://creativepool.com/jobs/
http://www.nucreativetalent.co.uk/candidates.html
http://www.orchard.co.uk/
There are agencies available to do the job searching for you however they tend to go on commission or a fee. I am currently in the process of researching and finding any agencies that specialise in creative/print.