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