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