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