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