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