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