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