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