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