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