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