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