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