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