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