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