The way I read it first time was to hold on the 325 radial. My colleague read it as holding on the 145 radial with a 325 inbound track.
Holds are defined by the Holding Fix, the Inbound Track to the Holding Fix and the Holding side.
I would, therefore, suggest that your colleague was correct and you were wrong.
A Fix could, obviously, be defined as a point (ie DME Distance) on a (VOR) Radial but the inbound Holding Track (QDM) also needs to be specified to know what Hold is required.