As you know, Daejeon is blessed with a fairly good bus service and there are numerous routes to almost all parts of the city. While a good copy of a map of Daejeon's Bus Routes can be found at the various Touruist Information Offices around town, one can also be found on the 'Travel Services' page of the 'Tour-2- Daejeon' site.
For a PDF service of the same file however, go here:
Deajeon Bus Routes Map [pdf File]
p.s. to zoom in, go to the box showing a % figure in the bar on the top left hand side of the page. The numbers in small colored boxes refer to the starting and ending points of each route.