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