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