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