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