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