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