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