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