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