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