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