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