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