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