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