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