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