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