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