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