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