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