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