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