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)(11,13,15,16)(18,22)(20,27)(23,28)(24,29)(26,31)(30,32)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(18,23)(19,25)(22,28)(26,31) involution — undirected(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,18,20,22,21,23,27,28)(19,24,26,29,25,30,31,32)(1,3,5,4)(2,7,6,8)(9,11)(10,13)(12,15)(14,16)(17,19,21,25)(18,24,23,30)(20,26,27,31)(22,29,28,32)(1,4,5,3)(2,8,6,7)(11,15)(13,16)(18,23)(19,25)(22,28)(26,31)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.