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