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