One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(17,18,23,28)(19,25,29,32)(20,26,30,31)(21,27,22,24)(1,3,5,4)(2,6,7,8)(9,10,12,13)(11,14,15,16)(18,24)(19,29)(21,22)(25,26)(27,28)(31,32)(2,7)(6,8)(10,13)(11,15)(17,19)(18,25)(20,21)(22,30)(23,29)(24,31)(26,27)(28,32) involution — undirected(1,4,5,3)(2,8,7,6)(9,11)(10,14)(12,15)(13,16)(17,20,23,30)(18,26,28,31)(19,21,29,22)(24,25,27,32)(10,13)(11,15)(17,21,23,22)(18,27,28,24)(19,30,29,20)(25,31,32,26)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.