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