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