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)(11,15,16,13)(17,18,21,23)(19,20,24,30)(22,25,31,32)(26,29,27,28)(1,3,5,4)(2,6,7,8)(17,19,21,24)(18,20,23,30)(22,26,31,27)(25,29,32,28)(9,11,12,16)(10,13,14,15)(18,23)(19,26)(20,28)(22,31)(24,27)(29,30)(1,4,5,3)(2,6,7,8)(17,20)(18,24)(19,23)(21,30)(22,29)(25,27)(26,32)(28,31)(19,26)(20,29)(22,31)(24,27)(25,32)(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.