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)(11,15)(12,14)(13,16)(18,20)(19,23)(25,26,28,30)(27,31,32,29)(2,6)(4,7)(9,11,12,16)(10,13,14,15)(27,32)(29,31)(2,6)(3,8)(10,14)(13,15)(17,18,21,20)(19,22,23,24)(25,27)(26,29)(28,32)(30,31)(1,3)(2,4)(5,8)(6,7)(9,10)(11,13)(12,14)(15,16)(17,19)(18,22)(20,24)(21,23) involution — undirected(1,4)(2,3)(5,7)(6,8)(9,11)(10,13)(12,16)(14,15)(17,20,21,18)(19,24,23,22)(25,26)(27,29)(28,30)(31,32)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.