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