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