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