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