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