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