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