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