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