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