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