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