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