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