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)(19,26)(20,30)(24,25)(28,29)(31,32) involution — undirected(1,3)(2,6)(4,11)(5,10)(7,15)(8,14)(9,12)(13,16)(17,18,20,22,21,24,30,25)(19,27,28,32,29,23,26,31)(1,4,5,12)(2,7,8,16)(3,9,10,11)(6,13,14,15)(17,19,21,29)(18,23,24,27)(20,28,30,26)(22,31,25,32)(3,10)(6,14)(9,11)(13,15)(18,24)(22,25)(23,27)(31,32) involution — undirected(2,8)(6,14)(7,16)(13,15)(17,20,21,30)(18,25,24,22)(19,28,29,26)(23,32,27,31)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.