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