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