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)(17,18,23,27)(19,22,26,32)(20,25,30,31)(21,28,29,24)(2,5)(6,7)(9,10)(11,15)(12,16)(13,14)(17,19)(18,22)(20,28)(21,31)(23,26)(24,30)(25,29)(27,32) involution — undirected(10,14)(15,16)(17,20,22,29,23,30,32,21)(18,24,19,25,27,28,26,31)(9,11,13,12)(10,15,14,16)(17,21,32,30,23,29,22,20)(18,25,26,24,27,31,19,28)(1,3,4,8)(2,6,5,7)(9,12,13,11)(10,16,14,15)(17,22,23,32)(18,26,27,19)(20,29,30,21)(24,31,28,25)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.