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