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