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