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