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