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