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