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