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