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