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