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