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