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