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