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