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)(17,18,20,24,21,23,27,30)(19,22,26,29,25,28,31,32)(1,3,4,13,6,12,5,14)(2,7,9,11,10,15,8,16)(17,19)(18,22)(20,26)(21,25)(23,28)(24,29)(27,31)(30,32)(3,12)(7,15)(11,16)(13,14)(18,23)(20,27)(22,28)(26,31) involution — undirected(1,4,6,5)(2,8,10,9)(3,13,12,14)(7,16,15,11)(19,25)(22,28)(26,31)(29,32)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.