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