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