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)(17,18,21,25,20,24,29,23)(19,26,28,31,27,22,30,32)(1,2,3,4)(5,6)(7,8)(10,13)(14,15)(17,19)(18,22)(20,27)(21,28)(23,31)(24,26)(25,32)(29,30)(6,8)(18,23)(21,29)(22,31)(24,25)(26,32)(28,30) involution — undirected(9,11,12,16)(10,14,13,15)(18,24)(19,27)(23,25)(28,30)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.