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