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