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