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