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