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)(17,18,22,26)(19,28,29,24)(20,30,21,25)(23,27,31,32)(9,11)(10,13)(12,16)(14,15)(17,19,22,29)(18,24,26,28)(20,31,21,23)(25,32,30,27)(2,5)(6,8)(10,14)(11,16)(17,20,23,19,22,21,31,29)(18,25,27,24,26,30,32,28)(10,14)(13,15)(18,26)(24,28)(25,30)(27,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,21,31,19,22,20,23,29)(18,25,32,28,26,30,27,24)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.