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