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