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