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