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