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