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