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