Research whether this is in line with the industry standard for this position. There are a range of online resources to help you understand the industry average and what can be considered fair.
If you don't think the salary is fair, you can negotiate, but remember how competitive the graduate job market is.
Factor in the location, any perks that accompany the salary and any bonus structures also offered.
Remember graduate salaries often increase rapidly during the early years of your career. You can expect to see you salary increase after a probation period and when you start to make a valuable contribution to their company.