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