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