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