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