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