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