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