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