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