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