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