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)(20,24)(21,23)(25,29)(26,31)(27,30)(28,32) involution — undirected(1,3,5,4)(2,6,7,8)(9,10,12,11,14,16,13,15)(17,19,20,26,21,27,28,25)(18,22,24,31,23,30,32,29)(1,4,5,3)(2,6,7,8)(9,11,12,16,14,15,13,10)(19,25)(20,28)(22,29)(24,32)(26,27)(30,31)(2,7)(6,8)(9,10,13,15,14,16,12,11)(18,23)(22,30)(24,32)(29,31)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.