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