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