One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(7,8)(9,10)(11,15)(12,13)(14,16)(17,18)(19,25)(20,22)(21,24)(23,26)(27,32)(28,30)(29,31) involution — undirected(1,2,5,6)(3,7,4,8)(17,19)(18,23)(20,25)(21,29)(22,26)(24,32)(27,30)(28,31)(10,13)(14,15)(18,20)(19,26)(24,28)(27,29) involution — undirected(1,3,5,4)(2,7,6,8)(9,10)(11,14)(12,13)(15,16)(17,20,22,18)(19,25,26,23)(21,28,30,24)(27,32,29,31)(9,11)(10,14)(12,16)(13,15)(17,19)(18,23)(20,25)(21,29)(22,26)(24,32)(27,30)(28,31) involution — undirected(1,4,5,3)(2,8,6,7)(17,21,22,30)(18,24,20,28)(19,27,26,29)(23,31,25,32)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.