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