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