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