W = [5 1 5 4 6 1 1 4 7 2 6 7 3 2 1 2 3 8 2 8];
DG = sparse([1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6],[2 3 1 3 4 5 1 2 4 5 2 3 5 6 2 3 4 6 4 5],W)

h = view(biograph(DG,[],'ShowWeights','on'))
[dist,path,pred] = graphshortestpath(DG,1,6)

set(h.Nodes(path),'Color',[1 0.8 0.5])
edges = getedgesbynodeid(h,get(h.Nodes(path),'ID'));
set(edges,'LineColor',[1 0 0])
set(edges,'LineWidth',1.5)