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