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