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