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