The ornamental design for a displayscreen with graphicaluser interface, as shown and described.
FIG. 1 is a front view of a first embodiment of a display screen with a graphical user interface; and,
FIG. 2 is a front view of a second embodiment of a display screen with a graphical user interface.
The broken line showing a display screen and user interface elements is for the purpose of illustrating portions of the article and forms no part of the claim.