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