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