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