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