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