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)(11,16)(12,14)(13,15)(18,22)(20,27)(23,28)(24,29)(26,31)(30,32) involution — undirected(2,5)(6,8)(11,12)(14,16) involution — undirected(9,11,13,12)(10,14,15,16)(17,18,20,22,21,24,27,29)(19,23,26,28,25,30,31,32)(9,12,13,11)(10,14,15,16)(17,19,21,25)(18,23,24,30)(20,26,27,31)(22,28,29,32)(1,3,4,7)(2,6,5,8)(18,24)(19,25)(22,29)(26,31)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.