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