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