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