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