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