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