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