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