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