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