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