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