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