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