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