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