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