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