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