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