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