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