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