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