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