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