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