One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,14)(12,13)(15,16)(17,18,20,22)(19,23,26,30)(21,24,27,28)(25,29,32,31)(2,5)(6,8)(18,22)(19,25)(21,28)(23,31)(24,27)(26,32)(29,30) involution — undirected(1,3)(2,6)(4,7)(5,8)(10,13)(14,16)(17,19,20,26)(18,23,22,30)(21,29,27,31)(24,32,28,25)(3,7)(6,8)(9,11,12,15)(10,14,13,16)(19,26)(23,30)(25,32)(29,31)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.