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