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