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