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