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