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