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