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