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