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