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