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