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