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