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