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