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