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