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