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