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