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