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