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