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