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