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