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