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