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