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)(11,14)(12,13)(15,16)(17,18)(19,23)(20,24)(21,26)(22,25)(27,30)(28,31)(29,32)(1,3,4,8)(2,5,6,7)(19,27)(20,29)(21,28)(23,30)(24,32)(26,31)(10,13)(14,16)(17,19,22,29)(18,23,25,32)(20,28,27,21)(24,31,30,26)(17,20)(18,24)(19,28)(21,29)(22,27)(23,31)(25,30)(26,32) involution — undirected(9,11,12,15)(10,14,13,16)(18,25)(23,32)(24,30)(26,31)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.