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