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