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