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