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