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