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