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