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