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