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