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