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