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