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