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