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