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