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)(17,18,20,24,22,26,21,25)(19,27,30,23,29,32,28,31)(1,2)(3,4)(5,6,8,7)(10,13)(14,16)(17,19)(18,23)(20,28)(21,30)(22,29)(24,27)(25,32)(26,31)(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)(18,24,26,25)(19,28,29,30)(23,27,31,32)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.