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