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