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