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