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