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