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