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