One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,4,8)(9,10,12,14)(11,15,16,13)(17,18,21,22)(19,25,27,23)(20,28,30,24)(26,31,29,32)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,23)(20,29)(21,27)(22,25)(24,32)(26,30)(28,31) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,20)(18,24)(19,26)(21,30)(22,28)(23,31)(25,32)(27,29)(10,14)(13,15)(18,22)(19,25)(20,30)(23,27)(26,31)(29,32) involution — undirected(1,4,5,3)(2,7,6,8)(10,14)(13,15)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.