The spins of colour centres are some of the most coherent systems available for quantum information processing. However, short-range entanglement generation from one centre to another or to a different quantum system is incredibly challenging. Nonetheless, doing so would have significant applications in quantum computing. This includes the colour centre serving as a quantum memory to a comparatively short-lived superconducting qubit, that is capable of robust qubit operations. This could be achieved by mutually coupling a colour centre and superconducting qubit to the same acoustic mode that serves as an intermediary. Here, we present a device consisting of a single silicon-vacancy (SiV) colour centre in diamond that is coupled to the phononic mode of a high-overtone bulk acoustic wave resonator (HBAR) and provide preliminary experimental and theoretical results. This hybrid device would enable the SiV to couple a variety of other quantum systems, including the proposed superconducting qubits. More broadly, our device would pave the way forward to using the techniques of cavity quantum acousto-dynamics to interface colour centres, and to explore the hitherto understudied interactions of spins and phonons at the level of single quanta.