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