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