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