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