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)(18,24)(19,28)(21,22)(25,29)(26,32)(27,31)(10,13)(11,15)(17,18)(19,25)(20,29)(21,24)(22,31)(23,27)(26,28)(30,32) involution — undirected(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,28)(18,25,27,26)(20,21,30,22)(24,32,31,29)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,20,23,30)(18,26,27,25)(19,21,28,22)(24,32,31,29)(9,11,12,15)(10,14,13,16)(17,21,23,22)(18,24,27,31)(19,20,28,30)(25,29,26,32)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.