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