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