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