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