Congrats on finishing your PhD, that’s a big milestone! For postdoc in precision medicine or cancer drug discovery there are many strong groups. Some well known professors are Trey Ideker (UCSD, works on network biology and precision oncology), Eytan Ruppin (NCI, does cancer systems biology), and Aviv Regev (now at Genentech, still active in single cell and computational drug discovery). Also many labs in Europe like at EMBL or ETH Zurich do great work in this space.
If you are interested more on industry–academia bridge, AI-driven biotech groups like Ardigen are also pushing drug discovery using graph and ML approaches, could be useful inspiration for your direction.
I would suggest shortlist the labs by both research fit and publication style, then reach out early since good postdoc spots fill fast.