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