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