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