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