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