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