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