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