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