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