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