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