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