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