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