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