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