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