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