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