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