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