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