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