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