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