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