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