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