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