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