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