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