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