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